creport: Parse info for crashed thread

stratosphere/creport/source/creport_thread_info.cpp

@@ -0,0 +1,50 @@
+#include <switch.h>
+
+#include "creport_thread_info.hpp"
+
+bool ThreadInfo::ReadFromProcess(Handle debug_handle, u64 thread_id, bool is_64_bit) {
+    this->thread_id = thread_id;
+    
+    /* Verify that the thread is running or waiting. */
+    {
+        u64 _;
+        u32 thread_state;
+        if (R_FAILED(svcGetDebugThreadParam(&_, &thread_state, debug_handle, this->thread_id, DebugThreadParam_State))) {
+            return false;
+        }
+        
+        if (thread_state > 1) {
+            return false;
+        }
+    }
+    
+    /* Get the thread context. */
+    if (R_FAILED(svcGetDebugThreadContext((u8 *)&this->context, debug_handle, this->thread_id, 0xF))) {
+        return false;
+    }
+    
+    /* Don't try to parse stack frames if 32-bit. */
+    if (!is_64_bit) {
+        return true;
+    }
+    
+    u64 cur_fp = this->context.fp;
+    for (unsigned int i = 0; i < sizeof(this->stack_trace)/sizeof(u64); i++) {
+        /* Validate the current frame. */
+        if (cur_fp == 0 || (cur_fp & 0xF)) {
+            break;
+        }
+        
+        /* Read a new frame. */
+        StackFrame cur_frame;
+        if (R_FAILED(svcReadDebugProcessMemory(&cur_frame, debug_handle, cur_fp, sizeof(StackFrame)))) {
+            break;
+        }
+        
+        /* Advance to the next frame. */
+        this->stack_trace[this->stack_trace_size++] = cur_frame.lr;
+        cur_fp = cur_frame.lr;
+    }
+    
+    return true;
+}